H - Electricity – 04 – L
Patent
H - Electricity
04
L
H04L 1/00 (2006.01) H04L 1/18 (2006.01)
Patent
CA 2725575
A system is provided for transmitting information through a speech codec (inband) such as found in a wireless communication network A modulator transforms the data into a spectrally noise- like signal based on the mapping of a shaped pulse to predetermined positions within a modulation frame, and the signal is efficiently encoded by a speech codec A synchro-nization sequence provides modulation frame timing at the receiver and is detected based on analysis of a correlation peak pattern. A request/response protocol provides reliable transfer of data using message redundancy, retransmission, and/or robust modula-tion modes dependent on the communication channel conditions
Linvention concerne un système pour transmettre des informations par un codec de la parole (dans la bande) tel quon le trouve dans un réseau de communication sans fil. Un modulateur transforme les données en un signal de type bruit spectral sur la base de la mise en correspondance dune impulsion mise en forme à des positions prédéterminées dans une trame de modulation, et le signal est encodé efficacement par un codec de la parole. Une séquence de synchronisation, qui procure la synchronisation de trame de modulation au niveau du récepteur, est détectée à partir de lanalyse dun motif de crête de corrélation. Un protocole de demande/réponse procure un transfert fiable des données à laide dune redondance des messages, dune retransmission et/ou de modes de modulation robustes dépendant des conditions de canal de communication.
Granzow Wolfgang
Huang Pengjun
Joetten Christoph A.
Leung Nikolai K. N.
Pietsch Christian
Qualcomm Incorporated
Smart & Biggar
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